I’ve been thinking about this all night and feel as if I should know this. What is cold, is it the lack of heat or an actual different thing? In other words, are hot and cold real tangible space occupying things and how so?
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You can think of heat as a kind of energy that is contained in molecules and atoms that basically represents their microscopic movement. If they have more heat energy, they vibrate faster. If they have less, they don’t vibrate and move around so much, but they’re never really *not* moving.
So cold is not really a thing per se. There are just things that are less hot.
There’s a lot more to say here so if you have other questions ask away.
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